Interlocking brake-shoe.



I G. W. CHIPLEY.

INTERLOCKING B SHOE.

APPLICATION FILED 1914.

1,144,639., Patented June 29, 1915.

M/VENTOI? as w A TTORNEYS To all whom it may concern:

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intense.-

' Specification of Letters Iatent.

Patented June 29, 1915.

- I -Application med August 5, 191%. .Serial No. 855,130.

Be it known that I, GARDINER fair, a citizen of the United States, and a resident of Los Angeles, in the county of Los Angeles and State of California, have made and invented certain new and useful Improvements in Interlocking Brake-Shoes,

of which the following is a specification. Y Y

My invention relates to an improvement in brake shoes, and more particularly to that. kind or type thereof usually known and referred to'as an interlocking shoe, that is, a shoe provided with means on the back of one shoe to engage with those provided on the face of another whereby-to secure the two shoes together, so thatthere may be secured a partially worn shoe to the face of an unworn shoe, and the partially worn shoe completely worn away in service.

The object of my invention is to provide a. shoe of this character wherein the two shoes may be securel and positively locked together, and at a su cient number ofplaces throughout their length to overcome any and all danger of separation should the partially worn shoe become cracked or broken.

A further object of the invention is to providesuch fastening means as will permit the two shoes to be quickly locked toinvention, the two shoes being secured toether and having one end of each partially firoken away in order to more clearly illustrate the method of attachment, the interlocking shoe being secured to a brake head in the ordinary manner, this view'bei ng taken on the line 1-1 of Fig. 2 after the brake head has been attached. .Fig. 2 is a plan view of the shoe, the brake headbemg removed. Fig. 3 is a bottom plan view of the same. Fig. 4 is a cross-sectional view taken on the hue 4-i of Fi 1, looking 1n the direction as indicated y the arrow. Fig. 5 is a sectional view taken on the hue 55 of Fig. 1 looking in the direction asindicated by the arrow. Fig. .6 is a similar view taken on the line 6-6 of Fig. 1 looking in the direction as indicated by the arrow.

Cure

The interlocking shoe, as a whole, comprises two shoes secured together, 7 representing the one shoe, and 8 the other shoe. As these two shoes are constructed in every we the same, the description of one will su ce for both.

The body of the shoe is preferably made of cast iron, although any other suitable metal may be employed for the purpose. It should also be understood that the shoe may be provided with any of the well known insorts in the wearing face, and also with any 'of the well known reinforcing members or elements located within the body of the shoe, or at or adjacent to the back; in the drawings, however, I have illustrated a plain shoe, omitting these well known elements, as they form no part of the present inven tion.

On the back of the shoe are formed the uide lugs 9 and end stops 10, of the usual formation and dimensions, and in accordance with the M. C. B. standards. 0n the back, and about the center of the length thereof, is also formed the attaching lug 11 provided with the usual opening 12 for the passage of the key 13 whereby to attach it to the brake head 1-1. On the back of the shoe are also formed the lugs or projections 15 located preferably on either side of the attaching lug 12, and on opposite sides of the longitudinal center of the shoe, each of these lugs being provided with an opening 16. extending through the same, for the passage of a nail, cotter pin, or other fastenin device, as will be hereinafter explaine While I have shown in the drawings but four of these lugs 15, it will be understood that any number ma be used andpositioned or located as may be desired, these lugs, as will be hereafter understood, being employed for the purpose of securely holding the partially worn shoe to the face of a new or unworn shoe. In the Wearing face of the shoe are formed recesses 17 to receive and contain the guide lugs and end stops formed on the back of the adjacent shoe, and in the face of the shoe are also formed recesses 18 to receive and contain the lugs or projections 15 on the back of the adjacent shoe, and also a recess 19 to receive and contain the attaching lug 11, the two shoes, when assembled, having the face of, one shoe bearing against and resting upon the back of the ad acent shoe as illustrated in Fig.

1, the projections on the back of one shoe fit- Y trating ting in the corresponding recesses formed in ing lug 11, so that when the parts have been properly assembled as illustrated in Fig. 1,

nails, cotter pins, or similar devices 25, may

be passed through the openings 20 whereby to lock the two shoes together, Fig. 4 illusthe nail or cotter pin passing through the lugs 15 and through-the body of the adjacent shoe, Fig. 5 showing a nail orcotter pin passing through the attaching lug and body of the adjacent shoe, and Fi 6 a similar fastening device passing throug the end stop andogening in the body of the adjacent shoe for olding the, two shoes to: gether.

From the foregoing it will be understood that by reason of the location of the lugs 15 .on either side of the attaching lug 11, and on opposite sides of the longitudinal center of the shoe, they in no wise interfere with the attaching key 13 emplo ed for securing the shoe to the brake head furthermore, that the two shoes are positively and securely locked together at the center thereof, and

also at points between the attaching lug andend stops, thus affording five different points or places at which the partially worn shoe is locked or fastened to the unworn shoe. Furthermore, it will be understood that by reason of theconstruction and formation of thisshoe, the two parts going-to make up the complete interlocking shoe, viz, the partially worn shoe and the unworn shoe, may be easily and readily assembled, and by the use. of nails, cotter pins or similar devices, they may be readily and securely locked together without the necessity of employing special tools therefon It will also be understood that b increasing or decreasing the number 0 places at which the shoes are locked together, the use of reinforcing members, such as steel backs, expanded metal, etc., may be avoided, for should the worn shoe become cracked or broken in service, it will remain fastened or locked to the un'worn shoe, and with little or no danger of becoming separated therefrom.

What I claim is I 1. An interlocking shoe comprising two shoes, a central key lug on the back of each shoe, an end stop at each end of said shoe, lugs formed'on the back of each of-said shoes and located betweenthe central lug and end stops, and on opposite sides of the longitudinal center of the shoe, said lugs being formed with transverse openings through the same, the wearing face of each of said shoes being provided with similarly located recesses to receive the lugs on the back of -a corresponding shoe, and each of said shoes being provided with transverse openings through the body and lugs, and pins fitting in said transverse openings whereby to retain the two shoes in their assembled positions.

2. Aninterlockin shoe comprising two shoes, a central key ug formed on the back of "each shoe, an end stop at each end of the shoe, lugs formed on the back of each shoe between said key lutg and end stops, and on the opposite sides 0 the longitudinal center of the shoe, each of said shoes being also formed with correspondingly located recesses in the wearing face thereof to receive said In s and end stops of the adjacent shoe, the b0 ies of each shoe, lugs and end stops, being provided with alined transverse openings, and pins fitting in said transverse openings and extending through the shoes whereby to retain the latter in their assembled positions.

Signed at Los Angeles, in the county of Los Angeles and State of California, this tenth day of July A. D. 1914.

GARDINER W. CHIPLEY..

- Witnesses:

J. H. BREWER, C. L. WALLACE. 

